<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>客户端登录</title>
    <style>
        body { font-family: Arial, sans-serif; text-align: center; padding-top: 100px; }
        .container { width: 300px; margin: 0 auto; }
        .btn-login { padding: 10px 20px; background-color: #4CAF50; color: white; border: none; cursor: pointer; }
    </style>
</head>
<body>
    <div class="container">
        <h2>欢迎使用客户端应用</h2>
        <p>请点击下方按钮进行统一身份认证登录</p>
        <a href="/login" class="btn-login">登录</a>
    </div>
</body>
</html>
    